American
Dad and Dalrock
have some posts up on the sort of cartoonish "chivalry" that some fathers at
least joke that they'll use with any guy trying to date their daughters. (eg:
"Toss him a shotgun shell, and tell him it moves a lot faster after 11.")

Which got me thinking:

As a bachelor I know if I went home to meet a girl's parents and her father
treated me with anything too far to either side of of cautiously optimistic
politeness (a sort of "I hope my daughter's found a good guy, but I'm not sure
yet, so I should get to know him so I can steer her away or towards as
required" attitude) I'd see it as a red flag.

If he responded with the sort of fawning automatic approval you sometimes
see in Hollywood, I'd worry that he'd been spoiling and fawning on "his little
princess" her whole life and as a result she was likely an emotional cripple.
(And he would likely cause any marital strife to escalate by encouraging her
to take any of my failings, real or imagined, out of proportion)

On the other hand if he responded with the sort of cartoonish
authoritarianism that these guys at least joke about, then I'd be worried that
if the man who knows her better than any other automatically assumes that
she's going to have freaky sex with any random arsehole who turns on the
charm, perhaps I should take him at his word.